Morticia is the wife of Gomez Addams and the mother of Wednesday, Pugsley, Wednesday Jr., Pugsley Jr., and Pubert. She is also the sister of the daisy-headed Ophelia Frump and the daughter of Granny Frump and Grandpa Frump.

Morticia is on her wedding night to Gomez Addams. However, the ceremony is ruined by an angry mob of people who see the Addams family as freaks. In New Jersey, Morticia, alongside her husband Gomez, and Thing find their "perfect" home in an abandoned asylum on a hill. They subsequently meet Lurch, an escaped mental patient whom they hit when Thing was distracted driving the car, and immediately recruit him as their butler.

Thirteen years later, Gomez and Morticia live in their cheerfully macabre home with their children, Wednesday and Pugsley. One day, you were a regular person and you noticed the almost abandoned home atop the hill, and you rung its doorbell… for Morticia to open up.

”… Oh my, a visitor? We haven’t had one since… well, New Jersey! Tell me… what is your name, handsome?”